Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 778 074
2) Placement test : grammar for beginners (anonyme) 5 991 109
3) A/AN (webmaster) 5 364 800
4) Auxiliary BE (webmaster) 3 224 106
5) Present continuous (webmaster) 2 998 997
6) Present simple (webmaster) 2 914 049
7) Present simple (webmaster) 2 597 366
8) Present continuous (webmaster) 2 434 139
9) Adjectives (webmaster) 2 093 476
10) A/an (anonyme) 2 015 166
11) Present perfect simple (webmaster) 1 643 285
12) Preterite (webmaster) 1 627 904
13) Vocabulary - Placement test (bridg) 1 619 118
14) Preterite (webmaster) 1 447 360
15) Short placement test (webmaster) 1 443 491
16) To be (bridg) 1 406 124
17) What time is it? (webmaster) 1 349 254
18) Present perfect (webmaster) 1 345 922
19) The alphabet in English (webmaster) 1 321 004
20) Adjectives (anonyme) 1 215 778
21) What time is it? (webmaster) 1 208 260
22) Numbers (webmaster) 1 188 517
23) 'A' ou 'An' (anonyme) 1 175 393
24) Two presents: present continuous, present simple (webmaster) 1 149 270
25) To be (bridg) 1 145 467
26) Comparatives / Superlatives (webmaster) 1 103 970
27) Numbers (webmaster) 1 070 719
28) CAN / MUST (webmaster) 1 058 581
29) THE/ A / AN / nothing (webmaster) 1 033 599
30) Comparatives (webmaster) 1 007 131
31) Family life (bridg) 1 000 740
32) Numbers > 100 (webmaster) 986 253
33) Future (going to/will/present continuous) (anonyme) 963 924
34) Plural (webmaster) 955 688
35) Superlatives (webmaster) 875 200
36) Adjectives (anonyme) 874 719
37) Simple present (bridg) 853 913
38) Spelled words N°1 (bridg) 850 100
39) Placement test beginners: Check your spelling (anonyme) 830 065
40) Introducing oneself (webmaster) 827 152
41) Adverbs of frequency (anonyme) 817 255
42) Family (bridg) 784 710
43) General test-End of high school / Beginning of university (webmaster) 782 784
44) Present simple (anonyme) 780 260
45) Frequency adverbs (webmaster) 777 726
46) Present BE + Ving (bridg) 765 055
47) Genitive (webmaster) 723 632
48) Passive form (anonyme) 721 644
49) Family tree (anonyme) 719 342
50) Preterite: simple or continuous? (webmaster) 716 597
51) Placement test (beginners) (lili73) 701 030
52) Past simple or present perfect (anonyme) 693 965
53) Future (webmaster) 675 887
54) 2 Preterites (webmaster) 661 989
55) Present perfect simple (bridg) 660 986
56) Preterite (webmaster) 620 374
57) List of 200 irregular verbs and audio (bridg) 616 008
58) Modals (webmaster) 612 669
59) Spelled words N°2 (bridg) 609 137
60) Height (webmaster) 606 284
61) Modals (webmaster) 605 349
62) Articles a / an / the (anonyme) 596 759
63) Plural forms (bridg) 577 403
64) Nationalities (webmaster) 574 199
65) Past continuous / Past simple (anonyme) 566 206
66) Irregular plurals (bridg) 553 575
67) Two presents: simple and continuous (webmaster) 549 553
68) Preterite (bridg) 548 970
69) Superlatives (frapedur) 538 699
70) Vocabulary: greeting people (here4u) 536 463
71) Give your opinion (bridg) 531 902
72) Adverbs of Frequency (bridg) 516 927
73) Present simple or continuous (anonyme) 510 895
74) Present perfect / preterite ? (anonyme) 509 454
75) Possessive case (anonyme) 480 622
76) Countries & nationalities (bridg) 473 398
77) 'The' or nothing? (webmaster) 471 214
78) Past tenses (bridg) 470 757
79) Introducing oneself (easy) (webmaster) 470 703
80) Passive voice (webmaster) 463 374
81) Present Simple vs. Past Simple (anonyme) 457 059
82) Questions : how to ask them (anonyme) 448 338
83) General Test II / End of high school / Beginning of universi (webmaster) 446 148
84) IN, ON, AT or TO? (webmaster) 445 109
85) Relative pronouns (webmaster) 444 386
86) Comparative of superiority (anonyme) 438 559
87) How to pronounce the final -ED? (past simple) (webmaster) 437 621
88) Relative clauses (webmaster) 423 217
89) Sounds: [h] (webmaster) 419 492
90) Comparative (anonyme) 413 595
91) A/an/Ø (bridg) 398 760
92) Past simple (anonyme) 397 046
93) Future simple (anonyme) 396 336
94) This / That / These / Those (webmaster) 392 508
95) Conditional (webmaster) 391 620
96) Passive voice (anonyme) 390 488
97) Comparing (webmaster) 387 974
98) Can / could/ may/ might (woodyrun) 379 437
99) Present perfect or past tense (anonyme) 377 319
100) Much, many, little and few (felin) 372 708
101) Personal pronouns (anonyme) 371 276
102) Preterite continuous (BE + -ING) (webmaster) 369 161
103) Some, any, no, enough, too/too much/too many (webmaster) 368 076
104) Genitive case (bridg) 368 015
105) Confusing words - Placement test (bridg) 364 518
106) Irregular verbs (webmaster) 363 549
107) Numbers from 1 to 10 (anonyme) 361 502
108) Past perfect simple, past perfect continuous (anonyme) 360 875
109) Present continuous or present simple (webmaster) 359 532
110) Present perfect or preterite? (anonyme) 356 697
111) Simple Past : regular verbs (anonyme) 352 955
112) Comparative Adjectives (bridg) 352 180
113) Who, Whom, Which, or Whose? (anonyme) 348 765
114) Past simple (video) (anonyme) 348 319
115) Past simple or past continuous (anonyme) 342 544
116) While / When (anonyme) 338 669
117) What time is it? (webmaster) 337 810
118) Modals (tinou) 336 511
119) Modal: may/might (anonyme) 334 186
120) Cardinal and ordinal numbers (anonyme) 328 689
121) The superlative (anonyme) 325 373
122) Possessive adjectives and pronouns (woodyrun) 324 171
123) How to talk about the weather (lili73) 320 879
124) Since and for (anonyme) 318 764
125) Flags (webmaster) 317 532
126) Irregular verbs (bridg) 315 966
127) Prepositions - in, on, at (anonyme) 314 105
128) Pronouns (woodyrun) 313 593
129) Tenses (anonyme) 311 887
130) Placement test 3 (webmaster) 310 432
131) Order of adjectives (webmaster) 306 545
132) Could/Couldn't (laure95) 305 786
133) Comparative (anonyme) 304 483
134) Adjectives and prepositions (anonyme) 304 002
135) Agreement Tags (webmaster) 303 998
136) Asking questions (webmaster) 303 057
137) Present perfect OR simple past? (bridg) 298 341
138) Questions in the past tense (anonyme) 297 512
139) Superlative Adjectives (bridg) 295 757
140) Uncountable nouns (webmaster) 295 595
141) Object pronouns (bridg) 294 887
142) Placement test 1 (anonyme) 292 754
143) Present simple (anonyme) 291 189
144) Passive form (anonyme) 291 037
145) Prefer/rather (bridg) 289 335
146) Can/Must/Should (laure95) 289 183
147) Past perfect (lili73) 288 003
148) Must or Have to? (woodyrun) 287 409
149) The/an/nothing (bridg) 285 191
150) To be (anonyme) 283 454
151) Can and can't (laure95) 281 451
152) Vocabulary: asking and answering (here4u) 280 440
153) Modal verbs (bridg) 277 224
154) Some / Any / no... (bridg) 270 430
155) Days of the week (bridg) 269 099
156) So / neither (anonyme) 264 315
157) Past simple (video) (anonyme) 263 681
158) Used to (bridg) 260 359
159) Present continuous (chnawa) 259 940
160) Should / must (anonyme) 259 511
161) Past tense (anonyme) 259 272
162) Vocabulary: on the phone (here4u) 258 725
163) Find out a quantity (webmaster) 258 530
164) Superlative + and adjective (anonyme) 257 139
165) Articles : a / an / the / Ø (anonyme) 256 824
166) Comparative and superlative (anonyme) 255 178
167) Numbers 1/100 (anonyme) 253 613
168) Modal can (video) (anonyme) 252 952
169) Comparatives (anonyme) 247 931
170) Relatives pronouns (who, which, that...) (anonyme) 247 838
171) Vocabulary: at the restaurant (here4u) 245 651
172) A few, a little, few, little (anonyme) 245 228
173) Would rather / would prefer to (anonyme) 244 223
174) Present continuous and the Going to form (anonyme) 242 531
175) Should/ have to/ must (anonyme) 239 895
176) Have something done (anonyme) 239 780
177) The past (webmaster) 237 774
178) Future continuous and future perfect. (felin) 237 591
179) Used to/would (woodyrun) 237 566
180) How to ask a question in English (bridg) 235 371
181) I wish, if only (felin) 234 052
182) Pluperfect (webmaster) 233 877
183) Countable or Uncountable? (webmaster) 233 114
184) Some / any (younes91) 232 700
185) Should / shouldn't (anonyme) 231 451
186) Present simple or continuous (bridg) 230 789
187) Adjectives - ing and ed (felin) 228 995
188) Hypothesis (webmaster) 228 088
189) Auxiliary BE (anonyme) 226 408
190) Articles a/an/the/0 (bridg) 226 265
191) Article The or nothing (anonyme) 225 899
192) Present perfect with Ever - never - (anonyme) 225 497
193) Must or mustn't (laure95) 225 456
194) Present continuous OR Present simple? (bridg) 225 340
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 778
196) To / in order to / so as to / so that (irish21) 220 046
197) Present perfect (bridg) 219 431
198) Comparison (komiks) 218 413
199) What time is it ? (anonyme) 217 629
200) Indirect speech (bridg) 216 522
